优化

app/src/main/java/io/legado/app/ui/config/BackupConfigFragment.kt

@@ -4,6 +4,9 @@ import android.content.Intent
 import android.content.SharedPreferences
 import android.os.Bundle
 import android.text.InputType
+import android.view.Menu
+import android.view.MenuInflater
+import android.view.MenuItem
 import android.view.View
 import androidx.preference.EditTextPreference
 import androidx.preference.ListPreference
@@ -57,13 +60,30 @@ class BackupConfigFragment : BasePreferenceFragment(),
         super.onViewCreated(view, savedInstanceState)
         preferenceManager.sharedPreferences.registerOnSharedPreferenceChangeListener(this)
         ATH.applyEdgeEffectColor(listView)
+        setHasOptionsMenu(true)
         if (LocalConfig.isFirstOpenBackup) {
-            val text = String(requireContext().assets.open("help/webDavHelp.md").readBytes())
+            showHelp()
-            TextDialog.show(childFragmentManager, text, TextDialog.MD)
             LocalConfig.isFirstOpen = false
         }
     }
 
+    override fun onCreateOptionsMenu(menu: Menu, inflater: MenuInflater) {
+        super.onCreateOptionsMenu(menu, inflater)
+        inflater.inflate(R.menu.backup_restore, menu)
+    }
+
+    override fun onOptionsItemSelected(item: MenuItem): Boolean {
+        when (item.itemId) {
+            R.id.menu_help -> showHelp()
+        }
+        return super.onOptionsItemSelected(item)
+    }
+
+    private fun showHelp() {
+        val text = String(requireContext().assets.open("help/webDavHelp.md").readBytes())
+        TextDialog.show(childFragmentManager, text, TextDialog.MD)
+    }
+
     override fun onDestroy() {
         super.onDestroy()
         preferenceManager.sharedPreferences.unregisterOnSharedPreferenceChangeListener(this)

app/src/main/res/menu/backup_restore.xml

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?>
+<menu xmlns:tools="http://schemas.android.com/tools"
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto">
+
+    <item
+        android:id="@+id/menu_help"
+        android:title="@string/help"
+        android:icon="@drawable/ic_help"
+        app:showAsAction="always"
+        tools:ignore="AlwaysShowAction" />
+
+</menu>